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Posted to dev@hive.apache.org by "Lefty Leverenz (JIRA)" <ji...@apache.org> on 2014/10/01 00:44:34 UTC
[jira] [Updated] (HIVE-7971) Support alter table change/replace/add
columns for existing partitions
[ https://issues.apache.org/jira/browse/HIVE-7971?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Lefty Leverenz updated HIVE-7971:
---------------------------------
Labels: TODOC14 (was: )
> Support alter table change/replace/add columns for existing partitions
> ----------------------------------------------------------------------
>
> Key: HIVE-7971
> URL: https://issues.apache.org/jira/browse/HIVE-7971
> Project: Hive
> Issue Type: Bug
> Reporter: Jason Dere
> Assignee: Jason Dere
> Labels: TODOC14
> Fix For: 0.14.0
>
> Attachments: HIVE-7971.1.patch, HIVE-7971.2.patch, HIVE-7971.3.patch
>
>
> ALTER TABLE CHANGE COLUMN is allowed for tables, but not for partitions. Same for add/replace columns.
> Allowing this for partitions can be useful in some cases. For example, one user has tables with Hive 0.12 Decimal columns, which do not specify precision/scale. To be able to properly read the decimal values from the existing partitions, the column types in the partitions need to be changed to decimal types with precision/scale.
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